Northern Adelbert languages

Northern Adelbert
Adelbert Range – Isumrud Strait Pihom–Isumrud
Geographic distribution	Adelbert Range, Madang Province, Papua New Guinea
Linguistic classification	Northeast New Guinea? Madang Central Madang Northern Adelbert
Glottolog	grea1298  (Greater Northern Adelbert) croi1234  (Croisilles)

The Northern Adelbert or Pihom–Isumrud languages are a family of twenty languages in the Madang stock of New Guinea. The occupy the coastal northern Adelbert Range of mountains directly opposite Karkar Island, as opposed to the Southern Adelbert languages, another branch of Madang.

Malcolm Ross posited a "linkage" connecting the Northern Adelbert languages with the Mabuso languages, and named this group Croisilles /krɔɪˈsɪlz/,^[1] as the two families bracket Cape Croisilles (Northern Adelbert to the north, Mabuso to the south). However, Ross never claimed Croisilles was an actual language family, and other researchers have rejected the connection.